Adjustable variocoupler



Jan, 20. 1925.

R. L. WALKER ADJUSTABLE VARIOCOUPLER Fileduan. 2e, 1924 oer Wzker,

Patented Jan. 20, 1925.

UNIT-ED. 'STATES PATENT OFFICE.

l' ROBERT -LEE WALKER,Y OF ATLANTA, GEORGIA, ASSIGNOR TO A. E. HILL MANUFAC- TURING CO., OF ATLANTA` GEORGIAQA CORPORATION OF GEORGIA.

ADJUSTABLE VARIOCOUPLER.

Application led January 26, 15;24. Serial No. 688,794.

To all 10710111, z't may concern:

Be it known that ROBERT L. WALKER, citizen of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, has invented certain new and uscful Improvements in Adjustable Variocouplers; and he does hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved inductance tuning Iinstrument, commonly known as an adjustable vario coupler, and used in tuning radio telegraph or telephone apparatus.

An object of the invention is to so construct an adjustable vario coupler in such a manner that the distributed capacity of the dielectric material and windings of the nductance coils will be reduced to a minimum, thereby securing the sharpest possible tuning with the apparatus.

A further object of the invention is to provide an adjustable vario coupler for radio telegraphy and telephony, which will be so constructed as to have the rotor entirely separated from the stator and not surrounded by the saine as in the usual construction, and to provide means for varying the distance between the rotor and stator to secure the best tuning of the circuit in which the vario coupler is employed.

Other objects will appear as the description proceeds.

In the accompanying drawings which 'form a part of my application,

Fig. l is a plan view of my improved adjustable vario coupler; j

Fig. 2 is a side elevation thereof, and

Fig. 3 is a detailed view of the rotor shaft and rotor ring showing my improved method of attaching the latticebank windings thereto.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts'.

I provide a stator ring l, preferably.

formed of fiber, and attached thereto at one or both of its edges the inductance windings 2, which in my preferred form, are of the lattice bank type of windings, and have the usualv coupler taps 3 connected therewith at the proper points.

At opposite points on the stator ring l I provide a pair of outwardly and laterally extending arms el which are attached to the ring at their inner ends by suitable fastening means and are provided at their outer ends with a plurality of openings G, to which a large coupler ring 7 may be selectively secured. A rotor shaft 8 formed of two portions connected together in spaced relation by means of an insulated bushing 9. and is rotatably mounted through the coupler ring 7 and tensioned by suitable spring 10. A coupler mounting 1l is secured to the coupler ring 7 for mounting the vario coupler upon a panel. The rotor shaft 5% extends out a considerable distance beyond the mounting l1, and is adapted to extend through an opening in the panel to receive a dial for rotating the same.

The two sections of the rotor shaft 8 are adapted to vextend through the rotor ring l2. The rotor windings 13, which are preferably of the lattice bank winding type, are secured at the opposite edges of the rotor ring` l2 at several points, by means of tie strings or wires 14, which are clearly illustrated in the detail view in Fig. 3 of the ofticial drawings.

From the foregoing description it will be apparent that the distance between the stator and the rotor may be easily and quickly varied by moving the position of the coupler ring T with respect to the several openings in the arms 4 either toward or away from the stator ring. The terminals of the rotor windings 13 will be connected to the two sections of thel rotor shaft 8 in the usual manner.

It will be apparent from the foregoing description that I have provided a highly efficient type of adjustable vario coupler in which the greatest efficiency may be had for either looseor tight coupling between the stator and the rotor windings, thereby insuring the best results with the circuit in which my in'iproved vario coupler is used.

Many minor changes in detail of description may be resorted to without departure to said stator ring, a coupler ring adjustably secured to said means, and a rotor mounted Within said coupler ring.

2. An adjustable vario coupler comprising a stator ring, a Winding` tied thereto, laterally extending arms attached to said stator ring, a couplerv ring adjustably I mounted between said arms, and a rotor mounted Within said coupler ring.

3. An adjustable vario coupler comprising a stator ring, a winding tied thereto, spaced arms secured to said stator ring, a coupler ring adjustably mounted between said arms, a rotor shaft mounted in said coupler ring, a rotor mounted on said rotor shaft and means for tensioning said shaft in said coupler ring.

4. An adjustable vario coupler comprising a stator ring, .a winding tied thereto, lspaced. arms attached to said ring, a coupler ring adjustably mounted between said arms, a rotor shaft mounted in sald coupler ring, a rotor mounted on sald shaft, means fortensioning said rotorshaft, and means attached to said coupler ring for attaching the same to a panel `or instrument board.

5.- An adjustable vario coupler comprising a stator ring, a Winding tied thereto, spaced arms attached to said ring, the outer ends of said arms being provided with a plurality of adjustment openings, acoupler ring selectively mounted between said openings, a rotor, mounted in said coupler ring. means for operating said rotor, and a mounting for attaching the coupler ring to a panel or instrument board.

Injtestimouy whereof I alix mysignature. V

AROBERT LEE WALKER. 

